Fluid-heating device



Jan. 3, 1928.

K. MUHLEISEN FLUID HEATING DEVICE l v e e h 4 S t 9 e h s 2 2 3 4 2 9 c m c e. D d 6 1 i F A TTORNE Y.

'4 have illustrated certain convenient forms of 1,654,551 T oF- icE- KARL MUHLEISEN, or PHILADELPHIA, PENNSYLVANIA, ASSIGNOR 'ro scnu'r'rnANn KOERTING comrANY or PHILADELPHIA, rnNNsYLvANr A conronA'rioN or PE NSYLVANIA,

Patented Jan. 3,.

UNITED STATES PAT-EN FLUID-HEATING DEVICE. Application Med December 20, 192 1. Serial No. 757,112.

My invention relates to devices 'for heatof aportion of a heating device comprising ing-fluids, particularly liquids, such as water, heating un ts embodying the invention; oil and the like, and it has for its general. .Fig. is a horizontal sectional view taken object to provide a novel device having means on the line 2-2 of Fig. 1; v 6 whereby great efiiciency is obtained in pro- Fig. 3 1s a plan or face view of one of the portion to the energy expended. elements or members of a heating unit; It is also an object of the invention to pro Fig. fl is a plan or face view of a plate vide a device having a novel construction which is interposed between'oppositely disof means whereby a maximum quantity of posed members of a heating unit'; fluid may be heated in a minimumof time Flg. 5 is a view partly in horizontal secwithina relatively small space. tion and partly in top plan of a heating A further object of the invention is to prounit, vide a heating device of novel construction I F1g 6 Is a vie w in central vertical seccomprising a plurality of spiral passageways tionshowing a modified construction of a.

arranged in superposed relation to each heating d vice embodying the invention;

' other, onefl of the said'passageways being Fig. 7 IS a view partly in horizontal secarranged so that the liquid flows theretion and Ipartly in top plan of the device through in a direction opposite to that in Shown 1n 1g. 6;

which it flows in the other passageway. F 1g. 8 is a plan view of the inside face of Another object of the invention is to proone 0f the oppositely disposed members of vide a heating device comprising! a couple the said device; I v

of disc-like members each of which .is pro- Fig. 9 18 aplan or face view of a plate,

vided with one or more spiral grooves in one adapted to be interposed between said mem side thereof, which discs are adapted to be bers; and secured together with the said groove in op F1g. posed relation to each other and se arated said oppositely disposed members. from each other by a sheet of suita 1e ma- 7 Referring to the drawingil designates a terial'which cooperates with the said grooves casing of heat insulating material within to form closed spiral passa eways. which a plurality of heating devices are A still further object of t e inventionis to adapted to be laced one above the other as provide a heating device comprising a pluillustrated in ig. 1. The insulating materality of heating units arranged in superposed relation toeach other.

No attempthas been made to point out allofthe objects and advantages which are in.- cident to the invention but in the detailed description thereof which. follows other objects andadvanta'ges of the invention will be spes cifically referred to or will be apparent basing 2 of metal. Referring to Figs 1 to 5 inclusive of the heating devicescomprises disc-like members 3 and 4:. r

vided respectively with spiral grooves 5 and 40 therefrom. "6 upon the oppositely disposed surfaces In order that the invention may be readthereof, and plate 7 is interposed between ily understood and its practical advantages and separates these members as is clearly fully appreciated, reference should be had shown in Fig. 1. The members 3 and 4 are to the accompanying drawing in which I bolts 10 which extend through openings near the peripheries thereof. The said members are clamped against the dpposite sides of the plate 7 so as to clamp and hold the sanie in stationary position therebetw'en.

. The member 3 is provided with an opening embodiment of the same. However, it-will be understoodthat'the invention is susceptible of embodiment in other forms of construction'than those shown, and that changes in the details of construction may-be made within the sec e of the claims "without de 12 whicliextendsfrom the periphery therepartin from t c said invention. Int edrawing: Y

Fig. 1 is-a central vertical sectional view of and communicates at its inner end with ner end of said groove terminates in an en- 10 is a top plan view of one oi the 80 drawing, it will be noted that each of the secured together by means of a plurality of rial 1 is surrounded by an outside covering orv Y The disc-like members '3 and 4 are .pro-

the outer end of the spiral groove 5. 1 The inuid flows through an opening 20 at the cen- This ter of the plate 7 into a recess 21 at or near the center of the disc-like member 4. From the latter the liquid is conducted through the closed passageway 6 to the outer end thereof from which it, escapes through a passageway 22 to the peripheral edge of the member 4 thence through a pipe, a portion of which is shown at 23, to its destination, not shown. It will be observed that theinner end portions 16 and 23 of the pipes extend through the casing composed of the portions 1 and 2. It will be observed that the outer sides of the disc-like members 3 and 4 are cut away to form relatively large recesses 25 and 26. Within these recesses the means for heating the discs 3 and 4 and the liquid which is caused to flow through the passageway/s 5 and 6 previously referred to is mounted.

In the construction as shown electric heating means is provided. Each heating unit comprises a disc or block of insulatin material 27 within the inner surface 0 which a spiral groove 28 is provided. Within the said groove resistance coils 30 are located which upon the passage of electric current therethrough become heated. The heatin of these COllS 0 rate to heat the discs 3 an 4, the heat of w ich is transmitted to the liquid as it flows through the passageways 5 and 6 so as toheat the same. The insulating discs or blocks 27 are secured to the plates 3 and 4 by means of screw bolts 31 as shown.

It will be noted that the passageways 12 and 22 are located in diametrically opposed osition with respect to each other. It will Ee'understood, however, that if desired the disc-like members 3 and 4 may be ad'usted with relation to each other so as to c ange the position of the said openings 12 and 22 with res act to each other as is indicated in Fig. 5 o the drawing. In such case it will be understood that the necessary chan es in the positions of the openings throng the casing comprising made. Such ad ustment of the dISG-llEG members 3 and 4 with respect to each other obviously is rendered possible because oi the fact that communication from the passageway 5 to the passageway 6 is efi'ectedthrough the o ning 20 at the center of the plate 7.

ing the case it is clear that the disclike members 3 and 4smay be rotat velyjadjusted' relatively to. each other so that the positions of the pipes, and 23 withresp'ect the parts'l and 2 must be cal relation to each other as is shown in Figs. 1 and 2 is prevented. I

As is indicated in Fig. 1 of the drawing, a plurality of fluid heating units comprising the parts or elements 3, 4,7, etc., may be placed in superposed relation to each other,

as is shown, within the chamber formed by the casing comprising the parts 1 and- 2. The heatmg un1ts are separated from each other by .means of a discor diaphragm 33 which preferably should be of insulating material.

In the construction as thus far described I have provided in each of the disc-like members 3 and 4 a single spiral groove, but if desired a couple of spiral grooves arranged in parallel or side by side relation to each other may be provided. In one face of each of the said disc-like members in Figs. 6 to 10 inclusive of the drawin I have shown a construc-. tion of the latter ind. 1 i

The parts 10, 12, 1s, 22,- 23, 25, 27 '28, 30

- 'a'nd 31-shown in said fi ures are identical with the parts correspon ingly numbered in Figs. 1 to 5 inclusive of the drawing.

In the said Figs. 6 to 10 inclusive the disc-like members 3 and 4 are secured toether b the' bolts 10 and are separated om eac other by' a plate 40 of metal or other suitable material. The disc-like member 3 is provided with a couple of spiral passageways 41 and 42. The outer end of the former is in communication with the inlet opening 12 and its inner end is in communication with an enlarged o ening 43 at the center of the disc-like mem r 3'. The inner end of the passageway 42 isin communication with the sald enlarged opening and the outer. end thereof terminates or merges into a groove 44 which is concentric with the center of the disc-like member 3. The fluid, such as water, oil or the like, flows from the the perip cry of theplate 40 into a concentric groove 46 in the disc-like member 4, whic groove is located in oppositely dissed relation to the groove 44. The fluid aving entered the groove 46 flows along the spiral passageway 4 and is dischar ed at the inner end thereof into an enlarge openin 48, andv from the latter enters the inner en of a spiral passageway 50 and flows outwardly therethrough from which it is discharged through the pamageway 22 which leads to the periphery of the disc-likememher 4 and is in communication with the outlet pipe 23. By providing a couple of grooves in sideby side relation to each other in the'inner side of each of the disc-like members 3 and 4', the length of the passageway groove 44 through openings 45 near is increased and consequently the period of time during which .it is subjected to the action of the heating element is increased.

By providing the concentric grooves 44 and 46 near the peripheries of the disc-like members 3 and 4" I am enabled to rotatively adjust the said members with respect to each other so that the inlet and discharge openings 12 and 22 need not be located in diametrically opposite positions with respect to each other as shown'in Figs. 6 and 7, but

may be angularly relatedto each other the same as is the case in the construction dis,- closed in Figs. 1. to 5 inclusive.

It will be understood that when a plurality of heaters or heating units are arranged one above the other as indicated in Fig. 1 the inlet pipes may be connected with and supplied from a. single supply pipe and that the outlet pipes leading from the respective units may be connected with and discharged through a single discharge pipe.

It will be also understood that the heating coils of all of the units may be supplied with electric current from a single or common source. I have not shown the single supply and the single discharge pipe or the means for supplying electric current from a single source because these features of construction are common mechanical expedients and constitute no part of my invention.

It will be'understood that by my invention I have provided a heater or heating unit which is of simple construction and which is highly eflicient; also that I have provided a construct-ion of heater which is of flattened formation so that it is Well adaptedto constitute and form a part of a battery of heaters or heating devices such as that indicated in Fig. 1 of the drawing, where it is desired to heat at. one time a greater volume of fluid than may be'heated by .a single unit. By increasing the number of units the volume of fluid which may be heated'at one operation or at one time may be increased as desired.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

1. A heating device, comprising members center whereby the passageway in one'bf the 'is'aid members is in 'communication with the passageway ,m the other said member, and

electrically heated coils located in contiguous relation to the outer sides of said members for heating thefsame toeflect heating other, a plate ways. i v

. 2. A heating unit comprising disc-like members each of which is provi located between the said disc-like members ,which plate is adapted to contact with the edges of said grooves and convert the same into closed passageways, the said plate having an opening therethrou h at its center, means for securing the sat disc-llke members together and clamping the said plate between the same, means for supplying a fluid to the outer end of one of the said passageways, which fluid is adapted to flow through the openin through said plate into the passageway in the other ofsaid disc-like members, means for conveying the fluid from the outer end of the said last-named passageway, and electrically heated coils located in contiguous relation to the outer sides of said disc-likemembers for heating a fluid as it flows throughthe said spiral grooves.

A heating unit comprising a plurality of members secured together, each of said members being provided with a spiral passageway upon its inner side, the said passageways being in communication with each ocated between said members and closing one side of each passageway, a pipe having communication with. one of said members for supplying. a fluid to the passageway therein, a discharge pipe having connection with the other of said members for conveying the fluid therefrom, and electrically heated coils located in contiguous relation tothe outer sides of said members for heating the said members to heat the fluid as it flows from the said passageways. 4. A heating unit'comprising a couple of members each of which is provided with a spiral passageway and with a depression at the center of its inner side-with which the inner. end of said passageway communicates a plate between and in contact with said members which plate is provided with a central opening through which said depressions (l with a spiral groove upon its inner side, a plateare in communication, means for delivering a fluid to the outer end of the passageway in one of the said members, means for discharging the fluid from the outer end of the passageway in the other of said members, means whereby the said members may be adjusted with relation to each other without interfering with the communication of the saidspiral passageways with each other, and electrically heated coils located in con-. tig'uous relation to the outer sides of said members for heating a fluid as it flows through the said spiral passageways.

- 5. A heating unit comprising a plurality of disc-like members located in parallel spaced relation to each other, each of which is provided with a spiral groove 'u onits mner side, one end of each of whic is 10- cated adjacent to the periphery of a disc and* members, a conduit for conveying a fluid from the outer end of the passageway of the other of said disc-like members, and separate means located in contiguous re1ation to the outer sides of said disc-like members for heating the said fluid as it flows through said passageways.

6. A' heating unit comprising a couple of disc-like members located in parallel spaced relation to each other each of which is provided with a spiral groove upon its inner side, the outer end of the groove in each disc-like member being located adjacent the periphery thereof and the inner end of said groove being located at the center thereof,

a plate located between the said disc-like members for closing one side of each of said grooves which plate is provided with an opening at its center whereby the inner ends of the passageways formed by the said grooves are placed in communication, means or securing the said disc-like members and said plate together, means for delivering a fluid to the outer end of one of said passageways, electrically heated coils located in convhtiguous relation to the outer sides of the said disc-like members for heating a fluid as it flows through the said spiral grooves, and means for conveying the fluid after it has been heated from the outer end of the other of said passageways.

In testimony that I claim the foregoing as my invention, I have hereunto signed my name this 16th day of December, 1924.

, KARL MUHLEISEN. 

